package com.hyy.lotterysystem.dao.mapper;

import com.hyy.lotterysystem.dao.dataobject.PrizeDO;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface PrizeMapper {


    @Insert("insert into prize (name,image_url,price,description) " +
            "values (#{name},#{imageUrl},#{price},#{description})")
    @Options(useGeneratedKeys = true,keyProperty = "id" , keyColumn = "id")//自动把数据库中的id映射到Java对象里的id
    int insert(PrizeDO prize);

    //获取奖品总量
    @Select("select count(*) from prize")
    int count();

    @Select("select * from prize order by id desc limit #{offset}, #{pageSize}")
    List<PrizeDO> selectPrizeList(@Param("offset") Integer offset,
                                  @Param("pageSize") Integer pageSize);


    @Select("<script>" +
            " select id from prize" +
            " where id in" +
            " <foreach " +
            "item='item' collection='items' open='(' separator=',' close=')'>" +
            " #{item}" +
            " " +
            "</foreach>" +
            " </script>")
    List<Long> selectExistByIds(@Param("items") List<Long> ids);


    @Select("<script>" +
            " select * from prize" +
            " where id in" +
            " <foreach item='item' collection='items' open='(' separator=',' close=')'>" +
            " #{item}" +
            " </foreach>" +
            " </script>")
    List<PrizeDO> batchSelectByIds(@Param("items") List<Long> idList);


    @Select("select * from prize where id = #{id}")
    PrizeDO selectById(@Param("id") Long id);
}
